Nesmeyanov,A.N. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1960 , p. 195 - 199
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1960 , # 2 p. 211 - 216

Bestmann,H.J. et al.
Chemische Berichte, 1971 , vol. 104, p. 65 - 70